function foo()
  x = 1
  y = 2
end

function bar(x, y)
  local f = function(r, s)
    print('hello' )
  end
end

function baz( tab )
  bar(tab.x, tab.y)
end

print(1, 2, 2)

baz{x=3, y=4}

z = {
  x=2,
  y = 4
}

y = {z=2, x = 4}

foo()